The relation between edogite and mafic-ultramafic rocks of Maowu, Bixiling and Nanshanling in Dabie Mountains represents three different kinds of occurrence relations. Their protoliths are bedded cumulate formed by cr...The relation between edogite and mafic-ultramafic rocks of Maowu, Bixiling and Nanshanling in Dabie Mountains represents three different kinds of occurrence relations. Their protoliths are bedded cumulate formed by crystallization differentiation of basic magma, which experienced ultrahigh-pressure metamorphism under the mantle condition at the depth of more than 120- 150km during the colli-sion-subduction between the Yangtze Plate and North China Plate. Ti-dinohumite + Ti-chondrodite + magnesite + Al-poor pyroxene is the typical high-pressure mineral assemblage of mafic-ultramafic rocks which reveals the participation of H2O, CO2 and other volatiles-containing fluid in the ultrahigh-pressure metamorphism.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘The relation between edogite and mafic-ultramafic rocks of Maowu, Bixiling and Nanshanling in Dabie Mountains represents three different kinds of occurrence relations. Their protoliths are bedded cumulate formed by crystallization differentiation of basic magma, which experienced ultrahigh-pressure metamorphism under the mantle condition at the depth of more than 120- 150km during the colli-sion-subduction between the Yangtze Plate and North China Plate. Ti-dinohumite + Ti-chondrodite + magnesite + Al-poor pyroxene is the typical high-pressure mineral assemblage of mafic-ultramafic rocks which reveals the participation of H2O, CO2 and other volatiles-containing fluid in the ultrahigh-pressure metamorphism.
